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Revenue from Contracts with Customers - Disaggregation of Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |
Revenue | $ 1,836 | $ 1,899 | $ 2,164
Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 1,025 |  |
EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 485 | 492 | 587
APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 326 | 350 | 451
Recurring | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 883 |  |
Recurring | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 362 |  |
Recurring | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 206 |  |
Perpetual software licenses and hardware |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 73 | 106 | 340
Perpetual software licenses and hardware | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 36 |  |
Perpetual software licenses and hardware | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 23 |  |
Perpetual software licenses and hardware | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 14 |  |
Consulting services | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 106 |  |
Consulting services | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | 100 |  |
Consulting services | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue | $ 106 |  |
Calculated under Revenue Guidance in Effect before Topic 606 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 1,899 | 2,164
Calculated under Revenue Guidance in Effect before Topic 606 | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 1,057 | 1,126
Calculated under Revenue Guidance in Effect before Topic 606 | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 492 | 587
Calculated under Revenue Guidance in Effect before Topic 606 | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 350 | 451
Calculated under Revenue Guidance in Effect before Topic 606 | Recurring | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 873 | 801
Calculated under Revenue Guidance in Effect before Topic 606 | Recurring | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 305 | 282
Calculated under Revenue Guidance in Effect before Topic 606 | Recurring | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 185 | 171
Calculated under Revenue Guidance in Effect before Topic 606 | Perpetual software licenses and hardware | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 38 | 127
Calculated under Revenue Guidance in Effect before Topic 606 | Perpetual software licenses and hardware | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 43 | 112
Calculated under Revenue Guidance in Effect before Topic 606 | Perpetual software licenses and hardware | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 25 | 101
Calculated under Revenue Guidance in Effect before Topic 606 | Consulting services | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 146 | 198
Calculated under Revenue Guidance in Effect before Topic 606 | Consulting services | EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | 144 | 193
Calculated under Revenue Guidance in Effect before Topic 606 | Consulting services | APJ |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue |  | $ 140 | $ 179

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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